Severed bison head discovered in Boulder yard

BOULDER, Colo. 
Police in Boulder, Colo., are investigating how a severed bison head ended up on a decorative rock in someone's front yard.

The Denver Post reports (
http://bit.ly/s69rjR
) that police quickly ruled out one obvious potential source for a bison head in Boulder: the beloved buffalo mascot named Ralphie at the University of Colorado.

Boulder police spokeswoman Kim Kobel says a check on Ralphie shortly after the head was discovered Sunday morning showed he is OK.

Neighbors weren't able to provide police with additional information. They didn't know why someone would leave a severed head at the home.

Kobel says the case is being investigated as an animal cruelty case.

Investigators are reaching out to local ranchers and processing plants to find the source of the head.